Itchgrass (Rottboellia chochinchinensis), also referred to a raoulgrass, is an erect annual grass that reproduces by seed. Plants are pale-green in color, have short stiff hairs arising from the leaf sheath and leaf blade, and contain prop-roots near the base of the plant. The seed head is pencil-like and jointed. Mature plants may reach 10 feet in height.

Mature itchgrass plants with seeds.

Pencil-like and jointed seed head.

Cylindrical seed.

Seedling plant with seed attached.

Tillering plant with stiff hairs on leaf sheath.

Prop-roots.

Mature johnsongrass plants with seed heads.

Seedling johnsongrass.

Leaves have a prominent white mid-rib.

Rhizome johnsongrass plantlets in early spring.

Matures johnsongrass seeds.

Spreads by stolons and rhizomes.

Mature plants with seed heads.

Seedling.

Seed heads.